If possible, I'd like to see an option to flag a comment as offensive, as can be done for questions and answers. Name and shame, six examples of recent comments that are particularly offensive, made by people who seem to be unable to hold a discussion without resorting to insults as an excuse for not having any arguments:

There is a huge difference between telling someone that their idea is stupid, and telling them they're fuckwits, retards, lunatics, children, whatever. The former is criticism (whether it is valid and well-funded or not), the latter is a fallacy, not particularly healthy for a discussion and also quite pathetic. (Strangely these people also all claim they have given up, they will leave the discussion, ..., yet they keep returning to the comments to post more abusive messages.)

I followed the debate on that thread (and personally found it quite hilarious at some points), and I didn't see anything that offensive. Of course when you pull a sentence out of context it can seem a bit coarse. But about the flagging, if answers can be flagged, then why not comments too.